1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * Portions of this source code were derived from Berkeley 4.3 BSD 32 * under license from the Regents of the University of California. 33 */ 34 35 #include <sys/param.h> 36 #include <sys/isa_defs.h> 37 #include <sys/types.h> 38 #include <sys/sysmacros.h> 39 #include <sys/systm.h> 40 #include <sys/errno.h> 41 #include <sys/vnode.h> 42 #include <sys/uio.h> 43 #include <sys/debug.h> 44 #include <sys/file.h> 45 #include <sys/fcntl.h> 46 #include <c2/audit.h> 47 48 /* 49 * Unlink a file from a directory 50 */ 51 int 52 unlinkat(int fd, char *name, int flags) 53 { 54 file_t *dirfp; 55 vnode_t *dirvp; 56 int error; 57 char startchar; 58 59 if (fd == AT_FDCWD && name == NULL) 60 return (set_errno(EFAULT)); 61 62 if (name != NULL) { 63 if (copyin(name, &startchar, sizeof (char))) 64 return (set_errno(EFAULT)); 65 } else 66 startchar = '\0'; 67 68 if (fd == AT_FDCWD) { 69 dirvp = NULL; 70 } else { 71 if (startchar != '/') { 72 if ((dirfp = getf(fd)) == NULL) { 73 return (set_errno(EBADF)); 74 } 75 dirvp = dirfp->f_vnode; 76 VN_HOLD(dirvp); 77 releasef(fd); 78 } else { 79 dirvp = NULL; 80 } 81 } 82 83 if (audit_active) 84 audit_setfsat_path(1); 85 86 error = vn_removeat(dirvp, name, 87 UIO_USERSPACE, (flags == AT_REMOVEDIR) ? RMDIRECTORY : RMFILE); 88 if (dirvp != NULL) 89 VN_RELE(dirvp); 90 91 if (error != NULL) 92 return (set_errno(error)); 93 return (0); 94 } 95 96 int 97 unlink(char *name) 98 { 99 return (unlinkat(AT_FDCWD, name, 0)); 100 } 101 102 int 103 rmdir(char *name) 104 { 105 return (unlinkat(AT_FDCWD, name, AT_REMOVEDIR)); 106 } 107